OK. Allow me to provide. Back Splatter or Ricochet IS NOT a product of target distance. Splatter is a product of the alignment of the target face. A target set up at a right angle to the axis of the bullet flight path WILL cause bullets fired at it to bounce back. Targets sit up with the target base angled toward the shooter WILL cause bounce back. A target set up with the target base at a negative angle to the shooter will deflect the bounce back DOWN to the ground. It doesn't matter how far away the target is. If the bullet has sufficient retained energy, it WILL come back at you from a poorly set up target or a poor target stand. It is not a case of bullet material nor target material. It is all PHYSICS.
The was on You Boob a vid at one time of some clown with a high-power rifle shooting at a steel plate. The Plate was leaned up against a rock about 100 yards away. The plate was at a positive angel. The round he fired came back and took his headset off.
The Ball cam back because it hit a more solid part of the tree on a rounded surface and PHYSICS deflected the ball where it landed. Oh, also, a tree stump, once dried out, is no longer "soft"